Crieff



(No Model.)

R. P. 8v J. M. MONCRIEFF. TBA PUT, COFFEE POT, 6m.

No. 451,862. Patented May 5, 1891.

ma News versus co1. Hum-Lindo., msnm-cran, n. c,

NTTED STATES PATENT OFFICE.

ROBERT PETER MONCRIEFF AND JOHN MITCHELL MONCRIEFF, OF 'SOUTH SHIELDS,ENGLAND.

TEA-POT, COFFEE-POT, 80G.

SPECIFICATION forming part of Letters Patent No. 451,862, dated May 5,1891.

Application led May l, 1890. Serial No. 350,241. (No model.) n

T a/ZZ whom, in' muy concern.-

Be it known that we, ROBERT PETER MON- CRIEFF, jeweler, and JOHNMITCHELL -MoN- CRIEEF, civil engineer, subjects of the Queen of GreatBritain, both residents of 2O Argyle Terrace, South Shields, in thecounty of Durham, England, have invented new and useful Improvements inTea-Pots, Coffee-Pots, and other Similar Receptacles, of which thefollowing is a specification.

This invention comprises certain improvements in tea-pots, coiee-pots,and other similar receptacles so constructed that their liquid contentsare discharged by displacement. The liquid contents from receptacles ofthis character have hitherto been discharged only during the time theair-vent is closed and pressure maintained on the displacer, arelaxation of the pressure or an opening of th-e air-vent resulting in acessation of the tlow of liquid. In practice it has been found veryinconvenient to keep the airvent closed and simultaneously to maintainconstant pressure on the displacer during the time the liquid isrequired to flow, and our invention is designed with the objectofovercoming this inconvenience.

Our invention relates to the application of the siphon principle toreceptacles from which the liquid contents have hitherto been dischargedby displacement. Vhen once the siphon is started the contents willcontinue to flow automatically until the desired quantity has beendischarged, when the ilow may be conveniently stopped by the productionof a partial vacuum in the receptacle. This may be effected by closingthe air-vent and Withdrawing the displacer; and in order that ourinvention may be more fully understood and carried into practice we willnow proceed to describe the same with reference to the accompanyingdrawing, which shows the section of a tea-pot constructed in accordancey with our invention.

leg A curved to correspond with the curvature of the handle C; but theouter leg A may be made perfectly straight, or of a fanciful shape, asdesired.

D is a displacer, which may form part of the lid ot the vessel, and iscapable ot' being slid up and down within the cylindrical casing E, thetwo contiguous 'faces of the displacer and casing being worked up asnearly true as possible, so that they [it each other 6o practicallyair-tight. The knob F is provided with a central aperture G in directcommunication with the inside of the tea-pot, so that the air may freelypass through the aperture G into and out of the tea-pot. f

His a strainer of ordinary construction. It forms no part of ourinvention and may be dispensed with, although we prefer to use somethingot this kind to prevent the tealeaves from passing ott with the tea. 7o

To start the siphon the displacer D is raised with the aperture orair-vent G open. This allows the air to pass into the interior ot thetea-pot through the aperture G. The said aperture G is now closed by thefinger ot' the 75 operator or by other suitable means and the displacerD is gently pressed inward, thus compressing the air within the tea-potand forcing the liquid to completely lill the siphontube. The siphonhaving thus been started, 8o the displacer D is then released and theairvent unelosed, and the liquid will continue to iiow automaticallyuntil the siphoning action is interfered with by the adlnission of airto the Siphon-tube or by the production of a partial vacuum or othermeans. To stop the Siphoning when sufficient has been drawn off, thevent G is closed and the displacer quickly raised, creating a partialvacuum in the teapot, which causes the withdrawal of the liquid 9c fromthe tube and then stops the siphoning action. Then more tea, coffee, orother liquid is required to be drawn off, the action of the siphon isagain started, as before.

1. A tea-pot, coffee-pot, or other similar receptacle, consisting of avessel having an opening for the reception of a displacer adapted tocause a continuous dow of liquid from said receptacle upon insertingsaid displacer into roo Suid opening and stop the flow of liquid uponcreating apartial vacuum in Said receptacle, and a Siphon-spoutcommunicating with the interior of said receptacle, substantially as 5and for the purposes hereinbefore set forth.

2. A tea-pot., coffee-pot, or other Similar receptacle, consisting of aVessel having an opening at the top, a displaoer to fit said opening andprovided with an aperture G, and a Siphonro spout oornmunieating` withthe interior of Said vessel, these parts being arranged and oon-Struoted for joint operation substantially as hereinbefore Specified.

ROBERT PETER MONCRIEFF. JOHN MITCHELL MONCRIEEF. fVtnesses:

CHARLES WILSON, PERCY HEADS, 3 Dean Street, lVefwcastleon-TL/ne,Sol'ciors Clerks.

